Adolf moldenhauek



A. MOLDENHAUER. HYDRAULIC PUMP FOR LIQUID DISPENSERS.

(No Model.)

No. 590,233. Patented Sept. 21, 1897.

NITED STATES ADOLF MOLDENIIAUE R,

"0 union,

PATENT OF MUNICH, GERMANY.

SPECIFICATION forming part of Letters Patent No. 590,233, datedSeptember 21, 1897.

Application filed teptember 24, 1895. erial No. 568,470. (No model.)Patented in Germany November 2, 1898, No. 77,995,

and November 24, 1894.110. 82,654.

To all whom it may concern Be it known that-I, ADOLF MOLDENHAUER, asubject of the Emperor of Germany, resid ing at Munich, Germany, haveinvented certain new and useful Improvements in Apparatus for DispensingLiquids, (for which Letters Patent have been obtained in Germany, No.77,995, dated November2, 1893, and addition thereto, No. 82,654, datedNovember 24, 1894;) and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which itappertains to make and use thesame, reference being had to the accompanyin g drawings, and to lettersof reference marked thereon, which form a part of this specification.

My invention has relation to apparatus for dispensing so-called aeratedor carbonated liquids, more especiallybeer; andit has for its object theprovision of means whereby the beer may be drawn directly from thebarrel without loss of carbonic-acid gas, whereby air or carbonic-acidgas or a mixture of air and carbonic-acid gas may be supplied to thebarrel under pressure as a means for forcing the beer, whereby the airinthe room in which the beer is dispensed is excluded from the barrel, andwhereby the pressure under which the beer is forced may be regulated, aswill now be fully described, reference being had to the accompanyingdrawings, in which- Figure 1 is a sectional side elevation; Fig. 2, afront elevation of a dispensing apparatus embodying my invention Fig. 3,a front 7 elevation of the closing slides with their guides; Fig. 4, avertical section through Fig. 3, and Fig. 5 a sectional elevation of thefloatvalve and its vessel.

In the drawingsl have shown the air-co1n-,

a view to exclude foul air from the com:

pressor; yet where space is available the aircompressing appliances maybe located in the room where the beer is dispensed, and the supply ofair may then be taken from another room or from without the building,

In said drawings, A indicates a chest in the upper part of which iscontained a receptacle B for ice, which is provided with a lid b, and atits bottom with a gutter b, from which a pipe 12 passes downward forice-water.

.The chest A is provided with a door or doorsa for the introduction andremoval of the barrel or barrels F, the construction and arrangementbeing a well-known one. In this arrangement the chest is devoid of abottom and seats directly on a table, counter or bar, skid, or likesupport E, any usual or.

well-known means being provided to form an air-tight joint between thechest A and its support, which latter constitutes the bottom for thechest. The ice-receptacle B contains a cooling-coil h, to the terminalsof which are connected the flexible pipe f and the pipe g. The pipe f isconnected with a vent-plug adapted to be driven into the bung-hole inthe barrel F, a suitable stop-cock m being provided for theipurpose ofcutting off the connection between the barrel and the coil h. The pipe gis connected with the air-compressor D, presently to be described.

In its door a the chest A has a slot at of sufficient width to admit ofthe passage of a spigot G, said slot being normally closed by means oftwo slides 15 and t, sliding in suitable grooved guides T, the proximatefaces of said slides having a semicylindrical recess forming a bearingfor the spigot Gr.

The upper slide tis preferably provided with a hooked locking-latchthadapted to hook onto a suitable stud on the lower slide t, thusholding the slides close together, said slides forming a substantiallyair-tight closure of the slot a in the front wall or door CL of thechest and around the spigot G.

I will now describe the air-compressing appliances: These consist,essentially, of a coinpressing-cylinder, hereinafter called thecompressor D, to the upper end of which the pipe g, leading to thecooling-coil h, is connected, and means for supplying water to saidcylinder and admitting air thereto when found;

ing such that when the valve K is in a given position communication isestablished between the compressor and its supply branch k,

Fig. 2, while by revolving the valve ninety degrees in the properdirection communication is established between said compressor and thewaste-pipe Z. To the valve K is secured a weighted lever L, to which isattached a rod, cord, or chain it, that is carried to a standard S inthe bar-room, the free end of said rod being provided with a ring orhook adapted to be hooked into one of two pins or hooks p and p on saidstandard S. WVhen the rod is hooked to pin p, the valve-plug is in theposition shown in Fig. 2. When,on the other hand, the rod is hooked topin 13', communication is established between the compressor and thewaste branch Z.

It is obvious that if water is supplied to the compressor D undersuflicient head the air therein will be compressed and can then beadmitted to the barrel F by manipulating the cock on at the bung-vent,the supply of water to the compressor being automatically interrupted assoon as the pressure therein is equal to the pressure under which thewater is supplied, while such pressure may be regulated by varying thesupply of water-as, for instance, by means of a suitable valve orstopcock in the supply branch. Although in such an arrangement thewater-supply-regulating valve may be placed within reach of thebartender, yet in view of the fact that the head of water2'. 6., thepressure in the supplymainvaries considerably in a day unless great careis exercised, water may enter the beer-barrel. This I absolutely avoidby providing means for supplying water to the cylinder under a normalunvarying pressure or head suflicient for all emergencies, inconjunction with which I provide means within the control of thebartender for regulating the pressure according to the requirements ofservice. To these ends I-em ploy a supplyvessel 0, arranged above thecompressor D, the vessel being provided with an overflowpipe 0 and afloat-valve c, Fig. 5, that controls the supply of water.

In order that the height of the column of water may be varied for thepurpose of varying the pressure within the compressorD, and consequentlywithin the barrel F, according to requirements, I, secure said vessel toone arm of a two-armed lever u, fulcrumed in a bearing u on thecompressonhead, the other arm of said lever being suitably weighted tonearly counterbalance the vessel 0 when full of water, so that thealtitude of the vessel 0 relatively to the compressorD can be varied,thereby varying the height of the column of water and consequently thepressure thereof, the vessel 0 being connected with the supply branch ofthe three-way cock K by means of the flexible pipe d.

With a View to effecting the displacement of the vessel from thebar-room I attach a rod, cord, or chain to said vessel or to its lever,said rod, cord, or chain a being provided with a hook or ring u adaptedto hook onto staples or hooks h, arranged one above another on thestandard S, hereinbefore referred to. In'Fig. 2 I have shown the ringhooked onto the upper hook, the vessel 0 being then at its greatestaltitude. By moving the ring from hook to hook downwardly the height ofthe column of water between the supply-vessel O and the bottom of thecompressor D, and hence the pressure exerted in said compressor, will becorrespondingly reduced.

Air or, if desired, carbonic-acid gas or a mixture of air andcarbonic-acid gas may be supplied to the compressor D through asuitably-valved pipe 0. If air is employed, the pipe may be provided atits inlet with a checkvalve opening inwardly. Said inlet may open intothe room in which the compressing appliances are located, or it maybecarried outside of the building to take fresh air from without.

The operation of my improved apparatus is as follows: The vessel 0 isfilled with water, the three-way cock is closed, and a barrel of-beer Fis placed on the skid E. The spigot G and the bung-vent 2' are nowinserted to establish communication between the barrel F and thecompressor D through the connections f h g and the previously-closedstopcock is opened. The door at having been closed the slides 25 t areclosed. The rod n is now lowered and hooked to hook 19, thereby movingvalve K to the position shown in Fig. 2. Water will now flow from vessel0 into the compressor, compressing the air.

It will be readily understood that as the contents of the barrel aredrawn off and the pressure in compressor D lowered water flows into thesame in sufficient volume to maintain a practically constant pressure,so that the entire contents of the barrel F can be drawn off withoutloss of carbonic-acid gas, On the other hand, the air passing throughcooler-coil h is cooled. before being admitted to the barrel F, so thatthe temperature of the beer is not lowered by admission of air of highertemperature, the chest A serving the twofold purpose of cooling theforcing-fluid as well as the beer in barrel F.

Then the barrel is empty, the valve-operating rod or chain a is hookedto hook 19, thereby establishing communication between the compressor Dand the waste-pipe Z, and as the water runs off a partial vacuum isproduced in said compressor, whereby the air and carbonic-acid gas inthe barrel F and its connections is drawn back into the compressor. Theslides t and t on the door a are now opened and the stop-cock m closed,thus preventing the escape of the air and gas from the compressor andits connections. The

bung-vent i and spigot G are removed from the barrel, the latter liftedoff the skid E, and a fresh one is placed thereon and connected up, asabove described.

The capacity of the air-compressor D is in practice so chosen that allof the water contained therein is not drawn off during the re moval ofan empty barrel and the substitution of a full one and that no waterwill enter the connections between said compressor and the barrel duringthe dispensation of the contents thereof. Should the pressure he toogreat, which may be the case with a freshlytapped barrel, the vessel 0is lowered until the desired pressure is attained, this being eifectedby lowering the rod or chain a and hooking the same to the required hookh on the standard S, as will be readily understood.

The advantages involved in my improved dispensing apparatus consistchiefly in that loss of the carbonic-acid gas is prevented and in thatany remaining gas, after the contents of the barrel are exhausted, isalso utilized, so that in fact but very little air is required, and byreason of these beer may be kept on tap for a much longer time withoutbecoming flat than is the case in the prevailing mode of dispensing.Furthermore, access of foul air from the bar-room to the air-compressoris absolutely avoided, since the air can be taken either from a separateroom in which the compressor is located or from without the building.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

1. In an apparatus for dispensing liquids, the combination with anair-chamber having water inlet and outlet, a suitable valve or stop-cockfor controlling the same, and a pipe leading from the air-space of saidchamber, adapted. to be connected with a holder for the liquid to bedispensed; of a two-armed lever above the air-chamber, a vessel on oneand a balance-weight on the other arm of said lever, and a flexible pipeconnecting said receptacle with the Water inlet of the air chamberwhereby the height of the vessel, and consequently the column of waterrelatively to the air-chamber can be varied, by varying the relativepositions of the lever-arms, forthe purpose set forth.

2. In an apparatus for dispensing liquids, the combination with anair-chamber having ceptaele for water on one and a balancingweight onthe other arm of said lever, said vessel in communication with a sourceof supply of water under pressure, means for automatically controllingsuch supply, and a flexible connection between the vessel andwater-inlet for the air-chamber, substantially as and for the purposeset forth.

3. In apparatus for dispensing fermented liquids, the combination with aholder for the liquid to be dispensed, an air-chamber provided with awater-inlet and a water-outlet, a three-way cock controlling the same,and a pipe connecting the upper part of the chamber with the aforesaidholder; of a two-armed lever above said chamber, a vessel on one and abalance-weight on the other arm of said lever, means for varying thealtitude of the vessel relatively to the air-chamber and a flexible pipeconnecting the vessel with the aforesaid three-way cock, substantiallyas and for the purpose set forth.

4. In an apparatus for dispensingliquids,

ADOLF MOLDENIIAUER.

Witnesses:

EMIL HENZEL, L. ZECHMEISTER.

